This threads into the outside of the transmission case on the drivers side.

This is easily damaged as it is on the edge of the transmission case just above the pan rail.

Other Names for this Part:

Neutral Switch

NSS

Park / Neutral Switch

Shift Position Switch

This Switch contains a plunger which is actuated as the shift lever in the truck is moved.It is engaged by the detent arm on top of the valve body.This plunger is pretty common to stick over time , and the switch itself can also short out.When this occurs there's a very wide range of symtoms that can be present ;the most common being the vehicle simply won't start.

Please Note:For Most 1998-2001 They Take Another Style Switch - See Our Part # 12410C